<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>16-盒子的宽和高-边框线</title>
		<style type="text/css">
			.box{
				width:200px;
				height: 200px;
				/* border:1px solid red; */
				border-top:2px solid red;
				border-left:2px solid orange;
				border-right:2px solid green;
				border-bottom:2px solid hotpink;
			}
			
		</style>
	</head>
	<body>
		
		<div class="box"></div>
		
	</body>
</html>
